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Old March 18, 2013, 12:25 PM
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SugarJ SugarJ is offline
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Join Date: Jan 2008
Location: Langley, BC
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My System Specs

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1/2x3/4 refers to 1/2" ID x 3/4" OD. ID is inside diameter, OD is outside diameter.

As for what's the most common? Probably 3/8"ID. It's been proven that there's almost no difference in cooling capacity in most loops between 3/8" and 1/2" ID tubing, so it's simply a matter of which you think looks better. I like the big tubing myself.
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